Weight-loss surgery may help obese women lower their risk of developing cancer, Swedish researchers said on Tuesday.

They found women who had weight-loss surgery were 42 percent less likely to develop cancer during a 10-year study published in the journal Lancet Oncology.

Men in the study did not benefit, possibly because many cancers are driven by female hormones such as estrogen, they said, or simply because fewer men get weight-loss surgery.

Obesity has long been known to raise the risk of cancer, and the evidence continues to mount.

A study released on Tuesday in the Journal of the American Medical Association found people who were obese as young adults had twice the risk of developing pancreatic cancer, an especially aggressive kind.

Weight-loss operations - in which doctors change the digestive system's anatomy to cut the volume of food a person can eat - have been shown to reverse diabetes and reduce the risks of dying from heart disease.

The Swedish study, led by Lars Sjostrom of Sahlgrenska University Hospital in Gothenburg, compared 2,010 obese patients who had weight-loss surgery with 2,037 obese patients who got standard diet and exercise treatment. Continue article at original source

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